/**
 * This file is part of Megasquirt Logger for PalmOS.
 * Copyright (C) 2011 Andrew Beard
 *
 * Megasquirt Logger is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * Megasquirt Logger is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with Megasquirt Logger.  If not, see <http://www.gnu.org/licenses/>.
 */
#pragma once
#include <PalmTypes.h>

class Timer
{
  public:
    Timer( UInt32 nPeriod );
	~Timer();
	
  public:
    void StartTimer   ( void );
	void StopTimer    ( void );
	void CheckTimer   ( void );
	bool IsExpired    ( void ) const;
	
  private:
    static UInt32 TickDifference      ( UInt32 nStartTime,
                                        UInt32 nEndTime      );
    static UInt32 MillisecondsToTicks ( UInt32 nMilliseconds );
	
  private:
    UInt32 m_nPeriodInTicks;
	UInt32 m_nStartTicks;
	bool   m_bRunning;
	bool   m_bExpired;
};